单项选择题

A．It's of significance to make different reactions to t……

What does the fourth paragraph imply

A．It's of significance to make different reactions to the same things.
B．Scientific research is unreliable owing to the different observations.
C．People try their best to make impartial observation.
D．The way of observation varies from person to person.

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单项选择题By using the example of Galileo, the author intends to reveal that ______.

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D．observation is the only factor determining scientific research

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A．observation
B．hypothesis
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